An overcoat layer for an organic photoconductor drum of an electrophotographic image forming device is provided. A single temperature-dependent current source is trimmed to a predetermined value, for example to zero, at a first temperature, and then the current from the temperature-dependent current source is used to trim output parameters, i. The character recognition unit performs character recognition on the still image identified by the identifying unit. The housings are tapered from their maximum width sized to be slightly larger than the diameter of the disc-shaped cell batteries to either end thereof along their length, and have a depth sized to accommodate two of the stacked very thin, e. The sensing device also includes a detection unit arranged to detect the resonance wavelength shift for the two different radiation modes.